package com.cet.lxf.oop.test04;

/**
 * @program: algorithm
 * @description:
 * @author: 陈恩涛
 * @create: 2021-06-25 11:15
 **/
public class Main01 {
    public static void main(String[] args) {
        String s = "Hello";
        System.out.println(s);
        s = s.toUpperCase();
        System.out.println(s);
    }
}
